Brake-shoe.



No. 837,407. PATBNTED DEC. 4, 1906.

UNITED STATES PATENT OFFICE.

BRAKE-SHOE.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed July 19,1906. Ser al No. 326,881.

quick and positive adjustment whereby to set the shoe to compensate for wear and in which each adjustment of the shoe can be readily effected without removing; the shoe from the brake or supporting member.

WVith the above and other objects in view 4 and hereinafter explained my invention consists in certain details of construction and novel combination of parts, all of which will be hereinafter explained, pointed out in the appended claims, and illustrated in the accompanying drawings, in which Figure 1 is a perspective view of my brakeshoe connection, showing the parts to their initial adjustment. Fig. 2 is a longitudinal section thereof on the line 2 2 on Fig. 1. Fig. 3 is a transverse section taken on the line 3 3 looking in the direction of the arrow. Fig. 4 is a similar view showing the worn shoe adjusted on the connecting devices for bringing the worn face in position to again present a proper braking surface. Fig. 5 is a diagrammatic side elevation illustrating the position of the greatly-worn shoe in full lines and the manner in which the said Worn shoe can be set on the connecting devices to present new braking-faces. Fig. 6 is a horizontal section taken substantially on the line 6 6 on Fig. 1 and showing a modified construction hereinafter referred to.

In carrying out my invention I form the brake block or shoe A with a central transverse aperture a and at the opposite sides with a pair of sockets a and b, disposed in vertical alinement with the axis of aperture 0/. At the said opposite sides the shoe has additional sockets 1) adjacent thereto but disposed to the rear end of the upper sockets a and other sockets b 12 disposed adjacent to but in front of the lower socket b, as clearly shown in Fig. 3, from which it will be noticed the several sockets a, b, b, and b are disposed concentrically to the aperture a, the reason for which will presently a pear.

The brake rod or bar in the simplest form of my invention is integral with the crank portion b of the bolt end that adjustably carries the shoe A, or it may be bolted or otherwise made fast to the said crank portion 1)".

The bolt end B is made square in crosssection, has an annular enlargement or collar 1) at its inner end, and has its outer end b threaded to receive the clamp-nut C.

The shoe A has its aperture a of sufficlent diameter whereby it will rock upon the bolt end B, and when it is initially fitted upon the said bolt end it is fixedly held thereon by a pair of metallic clamping-plates d (1, having centrally thereof squared. apertures d d to slidably fit on the square bolt end B, and the plates each have a pair of oppositely-disposed inwardly-projected dowels (Z (P, that engage the vertically-Mined sockets a b in the opposite sides of the shoe, it being understood that when thus arranged the several parts will be held in a fixed connection by screwing up the clamp-nut C to firmly interlock the plates (1 d with the bolt end B and the sockets a and b.

By reason of arranging the parts as described, when the shoe is of the ordinary vehicle-wheel type it can be readily fitted on the brake rod or bar and firmly secured by the single nut O, and when so used as to be unfit for further use it can be as readily re moved to admit of substitution of a new shoe.

By providing the extra sets of sockets b and b and arranging them as shown, when the shoe is but partly worn the block can be correspondingly set up to the wheel by turning the block on the bolt B to bring the dowels in plate (1 in the other sets of holes, whereby to incline the block-for providing the necessary adjustment thereof to set the block, and, furthermore, since the block can be so readily removed from the bolt it can in case the lower end becomes much worn be turned to bring the lower worn end uppermost, as indicated in dotted lines on Fig. 5. 1

In Fig. 6 I have shown a slightly-modified arrangement of my brake-shoe connections, which is more especially provided for holding metallic shoes or blocks, and in said form the shoe has segmental serrated or toothed portions 1 to coact with like portions 2 on the inner faces of the opposite end of the plates (1, it being manifest that by loosing the nut O the block A can be turned to the position re quired for bringing the near face into proper set with the wheel and clamping the same by gripping the plates on the serrations or teeth in the sides of the block,

Having thus described my invention, what I claim, and desire to secure by Letters Patent, isi 1. A brake-shoe connection, comprising in combination with the transversely-operated block, of a bolt member adapted to loosely fit in the block-aperture, said memberhaving its inner end terminating in a crank member adapted for a fixed connection with the brake-bar, the outer end of said member being threaded to receive a clamp-nut, said bolt member having fiat sides, a pair of opposing clamp-plates slidable on the bolt member and having studs for entering the apertures in the sides of the block when the clamp-nut is applied to hold the block stationary, as set forth.

2. The combination with the centrally-apertured brake-shoe, said shoe having a pair of sets of upper and lower opposing sockets con.- centric with. the central aperture, of a brake rod having a crank portion and a bolt or spindle non-circular in cross-section, the inner end of the spindle or bolt having an annular collar and the outer end being threaded, a clamp-nut for said threaded end, and a pair of opposing clamp-plates slidably mounted on the spindle or bolt and having projections for engaging the sockets in the brake-shoe, as set forth.

3. The hereinbefore described improvement in brake-shoe connections, which comprises, in combination with the shoe, having a central circular aperture and a pair of sets of upper and lower opposing sockets concentric with the said aperture, a brake-bar having a crank member formed with anintegral spindle-bolt, square in cross-section, and adapted to loosely fit the aperture in the brake-block, said spindle having a collar at its inner end and its outer end threaded, a pair of opposing metal plates having square openings whereby to freely slide on the spin dle, said plates each having a pair of opposing dowels to engage the sockets in the opposite sides of the block, and the nut that engages the outer end of the bolt or spindle, all being arranged substantially as shown and described.

CHRISTIAN J AGER.

Witnesses:

EDNA I. MYERS, JOHN H. MIDDLETON. 

